domain ofdm
RSS domain ofdmTime-Domain and Frequency-Domain Per-Tone Equalization for OFDM Over Doubly Selective Channels
White Paper This paper proposes new time- and frequency-domain per-tone equalization techniques for orthogonal frequency division multiplexing (OFDM) transmission over time- and frequency-selective channels. It also presents one mixed time- and frequency... [03 Jul 2008]
Frequency-Domain Interference Cancellation for MIMO-OFDM Systems
White Paper This paper proposes a new interference cancellation scheme for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems in the presence of intersymbol interference (ISI). [03 Jul 2008]
Frequency Domain IQ Imbalance Correction Scheme for Orthogonal Frequency Division Multiplexing (OFDM) Systems
White Paper This paper describes the sources and the effect of the IQ imbalance as well as a new method for correcting the error due to the imbalance in Orthogonal Frequency Division Multiplexing (OFDM) systems. Future, high bit rate communication systems... [03 Jul 2008]
Long Range Channel Prediction for Adaptive OFDM Systems
White Paper Frequency domain channel prediction on each OFDM subchannel is first explored, and it is shown that the optimum prediction filter depends only on the time-domain channel statistics under certain assumptions. [03 Jul 2008]
Channel Estimation for OFDM Systems With Multiple Transmit Antennas by Exploiting the Properties of the Discrete Fourier Transform
White Paper Multi-carrier modulation, in particular orthogonal division frequency multiplexing (OFDM), has been successfully applied to a wide variety of digital communications systems over the past several years. [03 Jul 2008]
On the Necessity of High Front-Ends in Broadband Performance RF Wireless Access Employing Multicarrier Modulations (OFDM)
White Paper Multicarrier systems of the OFDM-type perform a frequency domain decomposition of a channel characterized by frequency selective distortion in a multitude of subchannels that are affected by frequency flat distortion. [03 Jul 2008]
Antenna Diversity for OFDM Using Cyclic Delays
White Paper The method is computationally highly efficient because the signal processing is done on the time-domain OFDM signals. A new technique is presented for exploiting antenna diversity in OFDM systems, which can be applied at the transmitter and/or at... [03 Jul 2008]
MIMO-OFDM Channel Estimation for Correlated Fading Channels
White Paper This paper presents MIMO-OFDM channel estimation for spatially correlated channels using frequency domain estimation techniques. For example, in a system with 16 transmit antennas, the use of additional filtering in spatial domain improves the... [03 Jul 2008]
Orthogonal Frequency Division Multiplexing for Hiperlan 2
White Paper The advantages of OFDM over TDMA and FDMA are discussed and the implementation of OFDM through Inverse Fast Fourier Transform (IFFT) in the discrete domain is described. This paper presents the basics of OFDM modulation as used in Hiperlan/2. [03 Jul 2008]
Multiple Antennae Receive Diversity for Mobile OFDM Systems
White Paper This paper investigates receive diversity for OFDM-based broadband communication systems. It considers the use of multiple antennas to combat time-selective fading and OFDM transmission in combination with an appropriate guard interval to suppress... [03 Jul 2008]
Low-Complexity Blind Carrier Frequency Recovery for OFDM Signals Over Frequency-Selective Radio Channels
White Paper This paper introduces a blind (i.e.data independent) algorithm for carrier frequency offset recovery in an orthogonal frequency-division multiplexing (OFDM) receiver operating over frequency-selective fading channels. [03 Jul 2008]
Goodput Enhancement of IEEE 802.11a Wireless LAN Via Link Adaptation
White Paper This paper gives an overview of the IEEE 802.11a Orthogonal Frequency Domain Multiplexing (OFDM) PHY with eight different PHY rates as well as the distributed coordination function (DCF) of the IEEE 802.11 MAC and derives the goodput performance... [03 Jul 2008]
ICI Cancellation Based Channel Estimation for OFDM Systems
White Paper Orthogonal Frequency Division Multiplexing OFDM), which is a multicarrier modulation scheme, splits high data rate information symbols into lower rate parallel data streams and transmits this parallel information on different orthogonal carriers. [11 Apr 2008]
Frequency-Domain Equalization for OFDM Over Doubly-Selective Channels
White Paper However, it is shown that by transferring the time-domain operations to the frequency-domain, we can approach the performance of the purely frequency-selective channel. This paper proposes a new equalization technique for multi-carrier systems over... [10 Apr 2008]
A Study of Channel Estimation in OFDM Systems
White Paper The channel estimation techniques for OFDM systems based on pilot arrangement are investigated. The estimation of channel at pilot frequencies is based on LS and LMS while the channel interpolation is done using linear interpolation, second order... [10 Apr 2008]
